package com.itheima.reggie.srevice.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.srevice.CategoryService;
import com.itheima.reggie.srevice.DishService;
import com.itheima.reggie.srevice.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CateGoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealService;


    /**
     * 根据id删除分类，删除前作出判断
     * @param id
     */
    @Override
    public void remove(Long id) {
        //判断菜品是否有其分类
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int dish = dishService.count(dishLambdaQueryWrapper);

        if (dish>0){
            throw new CustomException("当前分类关联了菜品，不能删除！");
        }

        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int setmeal = setmealService.count(setmealLambdaQueryWrapper);
        if (setmeal>0){
            throw new CustomException("当前分类关联了套餐，不能删除！");
        }

        super.removeById(id);

    }
}
